Electromagnetic device for operating type-writers.



G. A. WIKANDER.

ELECTROMAGNETIC DEVICE FOR OPERATING TYPE WRITERS.

APPLIOATION FILED 001. 18, 1910.

1,06%5661 v Patented July 15, 1913.

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WITNESSES: INVEIVI'OH awzm 72' BY ATTORNEY 'G. A. WIKANDER.ELEGTEOMAGNETIG DEVICE FOR OPERATING TYPE WRITERS.

APPLICATION FILED OCT. 18, 1910. 1 1,0 7,5 1 Patented July 15, 1913.

4 SHEETSr-SHEET 2.

rnmmm v 2 75 75 n 7.e; 7/ j 76' 70 6' I 6T I t 1 67 x WITNESSES:

ATTORNEY G. A. WIKANDER.

ELECTROMAGNETIC DEVICE FOR OPERATING TYPE WRITERS:

' APPLICATION FILED OUT. 18, 1910.

11 0 7 5 Patented July 15, 1913.

4 SHEETSr-SHEET 3.

ATTORNEY G. A. WIKANDER.

ELECTROMAGNETIC DEVICE FOR OPERATING TYPE WRITERS.

APPLICATION FILED 001. 18, 1910.

1,067,566 Patented Ju1y15,1913.

4 sHEETs-BHEET 4.

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ATTORNEY UNITED 'eusrhvus A. WIKANDEB. oEPoRrtAND, o'aneon.

, v I H I ELECTROMAGNETIC DEVICE FOR OPERATING TYPE-WRITERSSpecification of Letters Patent.

Patented July1 5, 1913.

Application filed October 18, 1910. Serial No. 587,766.

To all whom it may concern;

Be it known that I, GUs'rAvUs A. WI-

' iuxona, a citizen of the United States, and

awesident of Portland, in the'county of Multnomah and State of Oregon,have in- -pose of reducing the muscular exertion re-.

quired to be expended in the operation of such instrument, and at thesame tlme 1nsuring unlformlty 1n the impressions of the type; and what Ipurpose to accomplish bymy present invention is: to so arrange theoperating parts that the device may be w ukedat the highest speedwithout danger of any'of the component parts of my device interferingwith each other; also to obtain a device in which strength andflexibility are combined to produce a very rapid action, with no dangerof straining or otherwise injuring the working parts of my device.

My invention furthermore includes the special features hereinafter setforth.

ln the accompanying drawings, constituting a part hereof Figure 1 is asectional elevation of my device showing the key levers. space bar, andshift mechanism at rest; Fig. 2 illustrates the mechanism and operationof one of the key levers; Fig. 3 illustrates the mechanism and'operationof the shift key; Fig. 4 is. a right-end eleva; tion of my device,showing the electrical contact means mounted outside the frame;

Fig. 5 is apartial left-end perspective eleva-" tion showing the magnetmechanism mount ed outside the frame of my device, and as much ofthe'inside mechanism as convenient in order to illustrate the relativepositions of the parts of my device; Fig. 6 is a front pivotedcross-bars t, by pivots t.

elevation of the electrical contact mechanism shown in Fig. 4; Fig. 7"illustrates a modified form of the mechanism provided for establishingelectric contact by the depression of the keys," In Fig. 4 devices areshown comprising a single element for establishing electric contact,which element isadapted to be operated by the depression of the keys inany of the banks, while in the devices shown in. Fig. 7 each bank ofkeys is provided with individual means for establishing such electriccontact. Fig. 8 shows a modified form of the shift mechanism; Fig. 9shows. means for utilizing the action of the magnetto break the circuit;Fig. 10 is a partial top view of the parts shown in Fig. 31; and Fig. 11is a partial top view of'the parts shown in Fig. 8.

Mjy device is mounted on a base, a, to which are secured" perpendicularframesides' 6, c. In the frame-sides, Z2, 0, is mounted a seriesofrock-shafts, (Z, c, 7", g, h,

and rigid on these shafts are two. sets of bell-cranks, 2', j,respectively,"placedin close proximity to' the inside fa ces of theframesid'es Z), c. The bell-cranks are operatively connected togetherrespectively by bars is, Z. The shaft it extends outside the frame-sideb and is rotatably supported at its end by a column m on the base a. Atwo-armed lever n isfrigidly secured on said extension of the shaft h,and .to one extremity of said lever is attached a spring 0, which, beingfixed to the'base a, normally holds the lever n against an adjustablestop (j. The bell cranks, i, j, are made with horizontal arms 1 ,8,andin the outer ends of the latter are See Fig. 7. Suitable springs, u,hold these cross-bars against the shoulders 0, w of the arms 1, s. Onthe outer extremity of the lever, a, is pivoted a bell-crank 2, one endof which is operatively connected with the plunger g of a solenoidmagnet m by a bar 2. The bell-crank); is provided with an adjustablestop 4, and an expansion spring 5 holds said step 4 on the lever n.WVhen the magnet m is energized the lever n is first tilted until itrests on the stop 8, and any further motion of the plunger is net, beingunable to tilt the lever it, rocks the bell-crank 2 independent of saidlever,

thus preventing injury to said obstructed parts.

Directly above the shafts d, e, f, g, h is mounted a correspondingseries of stationary rods 10, on which fulcrum key-levers 11,

' made with pendentarms 12, the lower ends of which are curved so as tofit the shafts (Z, c, j, g, 72,. On said shafts d, e, f, 9, it arepivoted bifurcated fingers 13, the low'er'extremities of which rest onthe keys 14 of the typewriter while the bifurcatedends of said fingers 13 straddle said arms 12 of the keys 11. p

Bolts 15 are slidably mounted in the fingers 13 and are normally heldagainst the arms 12 of thekeys 11 by expansion springs 16, one end ofwhich bears against the nuts 15 on the bolts 15. The keys 11 and fingers13 are held in alinement and against lateral displacement by. collars19, rigidly secured on the shafts d, e, f, g, it.

When a key 11 is depressed its pendent arm 12 projects said bolt 15, ofthe related finger 13, into the path of across-bar 25', and as themagnet 50 is simultaneously energized, said cross-bar is forced down,carrying with it said finger 13, which in its turn actuates the type barmechanism of the typewriter.

To prevent the shafts d, c, f, g, h and the rods 10 from bending underthe working strain a suitable number of stiffening members, 17, areprovided, as illustrated in Fig.

To the stiffening members 17 are secured cross-bars 18,.'which serve asstops for the fingers 13. l/Vithout such stop it might hap pen that themomentum acquiredby a fin ger, 13, in its returnmove1nent,-weuld lift itso high as to bring its boltv 15 above its related cross-bar, renderingsuch finger inoperative for the time.

As already mentioned, the cross-bars -25 are pivoted to the arms 7*, s.The importance of this construction is realized by referring to Fig. 2.Suppose two keys, 11, of the same row, of my device, are operated inrapid succession, and thatthe bolt 15 of the re-v lated finger 13 of thesecond'operated key is projected before the cross-bars t of the arms 1",s, have returned to their normal, up position, then the cross-bars t, intheir return movement will tilt on its pivots'and slip by such secondprojected bolt, and become positioned ready to act again.

Journaled in the framesides, 7), c, and in close proximity to; the rodsl0,'is a corremenace sponding series of rock-shafts 20, and to the endsof these shafts are secured levers 21, 22, connected by a series ofcross-bars 23, 1

which bear against the bottom of the key disks 2 1. Thebars 23 may becovered with sleeves 25, to prevent anynoise being occasioned by thecontact of said parts.

Between the lovers 22 onthe outside of the v j ustably fixed a series ofarms 27, and on the' frame-side 0 are pivoted arms. 28, 29, supporting abar 30, provided w th a serles of projections 31; and a spring 32 isarranged.

to pull, on the bar 30, so as to cause said projections to bearagainstthe lower .ends of the'arms 27. i

To the frame side iaiis secured a plate 33, made of insulating materialand serving; as

an insulating base for an adjustable contact pin 34, and a stiffleaf-spring 35. Between the upper; end of the spring 35 and theframe-side c is hung a divided pivot' comprising twomembers 36, 37,jcltnnped together,

electrically insulated from each other, by a clamp 38. Thea-rm 29 isrigidly secured to the pivot member 36, and to the pivot member 37 isaffixed a contact arm 10. Insulated wires 11, 4:2 connect the contactswith the solenoid magnet and the source of electrical power. 1

The operation of my device is as follows: The operator depresses a keylever 11, projecting the bolt 15 of the respective fingerpiecei13 in thepath of a cross-bar 2?. 'As universal bail 23 is carried down by the keylever, its arm 27 moves the bar 30 forward and thus closes the circuiton the contacts 34., 40, whereby the magnet a" is instantly energized,tilting the lever n and forcing the cross-bars 2? down, and as across-bar it .catches said projected bolt 15, said fingerpiece 13 isbrought down rapidly, carrying with it a typewriter key 14:; and thetypebar to the platen. The moment the operator lets go of the key lever,the circuit is broken and all parts are restored to their normalposition.

Referring now to Fig. 7, it is noticed that an individual contact isprovided, for each bank of keys,'the contact arms 10 are secureddirectly to the ends of the shafts 20 by means of the insulating clamps38 and a corresponding series of contacts 34 are mounted on a suitableinsulated base 33*.

The operation of the shift mechanism illustrated in Figs. 1 and '5 isbrought out more clearly in Fig. 3. The shift key 11 is one of theseries of keylevers 11, and cooperates .with a finger 45, like fingers.13, except that it has .an integral pendent member 46, in

which is lodged a shouldered sliding stem.

47, controlled by a spring 48. The finger 45 bears on the shift key 14of the typewriter. An auxiliary key lever 52 straddles the key lever 11and is connected with a lock lever 50, journaled in a post 57 on thebase a. When the key 11 is depressed the cm cuit is closed and thefinger 45 moves'down fwhic-h holds. the finger locked until operatorlets go of the key 52. 6 In case the-operator accidentally depressesboth keys simultaneo usly, then the sliding stem, 47 yields andcompresses the spring .48 i1, passing over the stop projection of thestop lever 50, and having passed over said projection,.said springinstantly forces the sliding stem down into locking position.

In Fig. 8 is shown a modification of the shift mechanism. In this case alever takes the place of the key lever 11*. Said lever 55 is providedwith a notch 56 in its end, adapted to be engaged by the head of apawl57, pivoted on-the shift lever 58.

A suitable spring 59 holds the pawl 57 7 locked to the lever55, so thatwhen the shift key 60 is depressed the lever 55 follows until the triparm 61 of the pawl 57 strikes a stop 62, which trips the pawl, andpermits the lever 55 to return. The mechanism for locking the finger 45down is identical with the one already described. The post 57 is spring53.

like the post 57 but carries a bracket 57 in which the stop'62 ismounted. When de-' sired to lock the finger 45 for a time, as whenprinting a clause "in the upper case letters, the shift-lock-key 63 iscaused to engage with a projection on the bottom of the.

shift-key 5 8. 57 and 57 limit the pull of In Fig. 4 I have shown how Iuse a sin.- gle make and-break, for the whole device, said meansfurthermore arranged to be readily accessible. v

As well known, the quicker the current is broken the less the spark .on,the contact points.

To insure a Very rapid interruption'of the circuit, the make-and-breakmay-beac'complished by separate agencies. 1 The making of the circuitmay be accomplished as shown in Fig. 4 or 7, or indeed as shown in mysaid former application. To break the contact, the modificationillustrated in Fig. 9

' distance.

may be used, which is arranged as follows: To the magnet 00 issecured abracket 66,

made of insulating material, and on this is mounted a standard 67, fromwhich is suspended an oscillating arm 68, carrying a contact member 69,A post 70, also'mountedon the bracl'ret. 66, carries the other contactmember 71. A spring 72 holds the contact member 69 in its normal, closedposition.' Mounted on;l'a'nd insulated from the plunger 1 is a post 73,to which is secured a set-screw constituting a kick-off .74. Thus whenthecircuit is closed and the magnet is energized, pulling down itsplunger, the kick-off strikes the member 7 5, pivoted on the arm 68,moves the latter out of the way and instantly breaks thecircuit. Themember 75 is'controlled by a stop 76, sothat the downward movement ofthe plunger g will kick the arm 68 out of the way, while in its returnmovement the foot of the set-screw 74 will tilt the member 7 5 out ofthe way.

As wellknown, in operating a typewritingmachine, the initial blow on'thefinger key starts the'typ'ebar toward the platen, and its momentumcarries it the remaining It is therefore possible to adjust the kick-off74 so as to act before the stroke of the magnet plunger is completed.

In. the device illustrated in Fig. 9 the contacts 69, 71 and' theirsupports and connections constitute, as. apparent, a type of switchnormallyclosed, andopened as described, and for convenience will be soreferred to in the claims.

Iclaim: 1. In a device of. the character described, the combination of aframe, a series of rockable shafts journaled therein; a bank of keyspivoted in the frame; a corresponding series" of fingers provided withbolts normally retracted but projected by the depression of the relatedkey; connections between said rock shafts arranged to operate them inunison said connect-ions including fingeractuating mechanism comprisinghorizontal arms and a cross bar'pivoted at the'extremities of said arms;means holding said cross bar in and returning the same to its normalrelative position, with respectto said horiz'ontal arms; said cross-baradapted to engage, when depressed, with the. projected bolts of saidfingers, and to tilt on its pivots when, during its return movement, itstrikes a projected bolt; a magnet element; a two armed lever rigid onone of said shafts, adjustable stops located under the extremity of saidtwo-armed lever, and means holding the latter in position; a yieldingconnection between one arm of said two-armed lever and said magnetelement; stops arranged to limit the return movement of said fingersrelatively to the normal or initial position of the cross-bars of thearms of said finger-actuating mechanism; a series of pivoted universalbails, one'under each rowof keys; means holding said universal bails innormal position; a make and-break in circuit with the magnet clementincluding fixed and movable contacts normally apart; and means betweensaid universal bails and said movable contact whereby the depression ofanyone of the former will move the tions between said rock shaftsarranged to operatethem in, unison; said connections includingfinger-actuating mechanism comprising horizontal arms and a cross barpivoted at'the extremities of said arms; means holding said cross-bar inand returning the same to its normal relative position,

' of said two-armed lever and said magnet with respect to saidhorizontal arms; said cross-bar adapted to engage, when depressed, withthe projected bolts of said fingers, and

to tilt on its pivots when, during its return movement, it strikes aprojected bolt; a magnet element; a two-armed lever rigid on one of saidshafts, adjustable stops located under the extremity of said two-armedlever; and means holding the latter in position; a yielding connectionbetween one arm element; stops arranged to limit the return movement ofsaid fingers relatively to the normal or initial position of thecross-bars of the arms of saidfinger-actuating mechanism; a series ofpivoted universal bails, one under each row of keys; means holding saiduniversal bails in nor- .mal position; a make-and-break in circuit withthe magnet element including fixed and movable contacts normally apart;means between said universal bails and said mov I able contact wherebythe depression of anyone of the-former will move the latter to closedposition; and means operated by the magnet element adapted to interruptthe circuit energizing the magnet the instant the latter has beenenergized and has acted.

3. In a device of the character described, the combination of a frame, aseries of rockable shafts journaled therein; a banlr.

of keys pivoted in the frame; a corresponding series of fingers providedwith bolts normally retracted but projected by the depression of therelated key; connections between said rock shafts arranged to' operatethem in unison; said connections including finger-actuating mechanismcomprising horizontal arms anda crossbar pivoted at the extremities ofsaid. arms; means hold ingsaid cross-bar in and returning the same toits normal relative position, NVltll respect the combination of a tosaid horizontal arms; 'said c'rdssbar adapted to engage, when depressed,with the projected bolts of'saidffingers, and to tilt on its pivotswhen, during its return movement, it strike s a projected bolt; a magnetelement; a two-armed lever rigid on one of said shafts, adjustable stopslo-. cated under the extremity of said two-armed lever, and meansholding the latter in position; a yielding connection betweenone arm ofsaid two-armed lever and said magnet element; stops arranged to limitthe return movement of said fingers relatively to the normal or initialposition of the crossbars of the arms of said fingeractuating mechanism;a series of pivoted universal bails, one under each row of keys; meansholding said universal bails in normal position; a make-and-break incircuit with the magnet element including fixed and mov= able contactsnormally apart; means between said universal bails and said'mov ablecontact whereby the depression of any one of theiormer will move thelatter to closed position; and one pole of the circuit connection o'fthemagnet element including a switch normally closed, means carried by themovable part of said magnet element adapted to open said switch theinstant the magnet element has been energized and has acted. A

4. In a device ofthe character described, frame, a series of rockableshafts journaled therein; a bank of keys pivoted in the frame; acorresponding series of fingers provided with bolts normallyretractedbut projected by the de pression of the related key;connections between said rock shafts arranged to operate them in unison;said connections including finger-actuating mechanism comprisinghorizontal arms and a cross bar pivoted at the extremitiespf said arms;means holding said cross-bar in and returning the same to its normalrelative position, with respect to said horizontal arms; said cross-baradapted to engage, when depressed, with the projected bolts of saidfingers, and to tilt on its pivots when, during its return movement, itstrikes a projected bolt; a magnet element; a two-armed lever rigid onone of said shafts, adjustable stops'located under the extremity of saidtwoarmed lever, and means holdingthe latter in I position; a yieldingconnection between one arm of said two-armed lever and said magnetelement; stops arranged to limit the return inovement of said fingersrelatively to the normal or initial position of the crossbars-of thearms of said finger-actuating mechanism; a series of pivoted wuniversalbails, one under each row of keys; means holding said universal bails innormal position; a make-and-break in circuit with the magnet elementincluding fixed and movable cont-acts normally apart; means between saiduniversal balls and said movable contact whereby the depression ofanyone of the former will move the latter to closed position; and ashift key and means supplementary thereto whereby such shift key may belocked in its depressed position after having been operated.

In a device of the character described,

ties of said arms; means holdingsaidcross bar in and returning the sameto its normal relative pos tion, with respect to said horizontal arms;sa1d cross-bar adapted to engage, when depressed, with the projectedbolts of said fingers, and to tilt on 'its pivots when, during itsreturn movement, it strikes a projected bolt; a magnet element; atwoarmed lever rigid on one of said shafts, ad

justable stops located under the extremity of said t'wo-armedlever, andmeans holding the latter in position; a yielding connection between .onearm of said two-armed lever and said magnetelement; stops arranged. to

limit the return movement of said fingers relatively to the normahorinitial position of the cross-bars of the arms of said fingeractuatingmechanism; a series of pivoted universal bails, one under each row ofkeys;

' means holding said universal bails in normal 40 position; amakeand-break in circuit with the magnet element including fixed andmovable contacts normally apart; means bea tween said universal bailsand said movable contact whereby the depression of any one of the formerwill move the latter to closed position; one pole of the circuitconnection of the magnet element including a switch normally closed,means carried by the movable part ofsaid magnet element adapted to opensaid switch the instantthe magnet element has been energized and hasacted; and a shift key and means supplementary thereto whereby suchshift .key' may be locked in its depressed position after havingbeenoperated.

6. In a device of the character described, the combination of a frame, aseries of rockable shafts journaled therein; a bank of keys pivoted inthe frame; a corresponding series of fingers provided with boltsnormally retracted but projectedby the depression of there'lated key;connections between said rock shafts arranged to operate them in unison;said connections including finger-actuating mechanism comprisinghorizontal arms and a spring-controlled cross-bar pivoted at theextremities of said arms; said cross-bar adapted to engageflvhendepressed, with the projected bolts of said fingers, and to tilt on itspivots when, during its return movement, it strikes a projected bolt; amagnet element; a two-armed lever rigid on one of said shafts,adjustable stops located under the extremity of said two-armed lever,and means holdingthe latter in position; a yielding connection betweenone arm of said two-armedlever and said magnet element;

, stops arranged to limit the return movement of said fingers relativelyto-the normal or initial position of the cross-ba'rsof the arms of saidfinger-actuating mechanism; a series of pivoted universal bails, oneunder each row ofkeys; meansholding said universal bails in normalposition; va make-and break in circuit with the magnet elementincludingfixed" and movable contacts normally apart; and means betweensaiduniversal bails and said movable contact wherebythe depression ofany one of the former will move'the latter to closed'position'. l 7. Ina device of thecharacter described, the combination-of 'aj fra'l'ne, aseries ofrockable shafts journaled therein; a bank'ofkeys pivoted in theframe;"a corresponding series of fingers provided with bolts. normallyr'et-ractedi but projected by the depression of the related key;connections between said rock shafts arranged to'operate themin'unison;-- said connections including finger-a'ctuating mechanismcomprising horizontal arms and a spring-controlled crossbar piv- 'otedat the extremities of said arms;said

cross-bar adapted to engage, whendepre'ssed,

with the"projected boltsof'said fingers, and to tilton its pivots when,during its return movement, it strikes a projected bol t';ajt'wo armedlever rigid onone of said shafts, adjustable stops located under theextremityof said t'wo armed lever, andfa spi'in'g 'holding' thelatter'in position; a yielding connection between" one arm of said." two-armed lever and said magn'et element; stops arran'fi'ed'to limit thereturn movement of said tigers" relatively to the" normal or initialposition of the cross-bars of the arms ofsaid fingers mally retractedbut, projected by the depression of the related key; connections betweensaid rock shafts arranged to operate them in unison; said connectionsincluding finger-f gage, when depressed, with the projected bolts ofsaid fingers, and to tilt on its pivots 7 when, during its returnmovement, it strikes a projected bolt; a magnet element; a twoarmedlever rigid on one of said shafts, adjustable stops located under theextremity of said two-armed lever, and means holding the latter-inposition; a bell-crank mounted on one arm of said two-armed lever andconnected with said gnagnetelement; a stop and aspring controllingthemovement of such the former will bell-crank; stops arranged to liniitthe return movement ofsaid fingers relatively to the no'rmal or initialposition of thecrossbars of the arms of said finger-actuating mechanism;a series of pivoted universal bails, one under eachrow of keys; meansholding said universal balls n normal posh .tion; a make-and oreak incircuit wlth the magnet element including fixed and movable contactsnormally apart; and means between said universal bail's and said'movablecontactwhereby the depression of,any one of move thelatter to closedposition.

9. In a device of the character described,

the combination of a' frame, a series of rockable shafts journaledtherein; a bank of keys pivoted in the frame; a corresponding series offingers provided with bolts normally'retracted but projected by thedepression of the related key; connections between said 1 rock shaftsarranged to operate them in uni-4 son; sald connections lncludingfinger-actuating mechanism comprising horizontal arms and aspring-controlled cross-bar pivoted at the extremities of sald arms;said cross-bar 7 adapted to engage, when depressed, with the projectedbolts of said fingers, and to tilt on its'pivots when, during its returnmovement, it strikes a projected bolt; a magnet element; a two-armedlever rigid on one of said shafts, adjustable stops located under theextremity of said two-arm'ed lever, and

a spring holding the latter in position; a yielding connection betweenone arm of said two-armed lever and said magnet element; stops arrangedto limit the return movement of said fingers relatively to the normalor,initial position of the cross-bars of the arms of saidfinger-actuating mechanism; a-

series of pivoted universal bails, .one under each row of keys; meansholding said universal bails 1n normal position; a make-andbreak incircuit with the magnet element in- --the make-and-break together.

eluding fixed and movable contacts normally.

apart; arms on the axis of said universal .b'ails; and means operated bysaid arms wherebythe depression of any one of the universal bails willmove said cont-acts of j 10. In a device of the character described,

the combination of a frame, a series of rockable shafts journaledtherein; a bank of keys pivoted in the frame; a corresponding series offingers provided with bolts normallyretracted but rejected by thedepression of the related zey; connections between. said rock shaftsarrangedto operate them inimison; said connections'includingfinger-actuating mechanism comprising horizontal arms and aspring-controlled cross-bar pivoted at the xtremities of said arms; saidcross-bar adapted to engage, when depressed, withithe projected bolts ofsaid fingers, and to tilt on its pivots when during its return movement,it strikes a projected bolt; a magnet element; a two-armed lever rigidon one of said shafts, adjustable stops located under the extremity ofsaid two-armed lever, and a spring holding the latter in position; abellposition-of the cross-bars ofvthe arms'of said finger-actuatingmechanism; a series of pivoted universal bails, {one under each row ofkeys; means holding said universal bails in normal position; ainake-andsbreak cir- \cuit with the magnet element including fixed andmovable contacts normally apart; and means between said universal bailsand said crank mounted on one arm of said two-.

movable contact whereby the depression of 1 any one of the former willmove the latter to closed position. v i 11. In a device of the characterdescribed, the combination of a frame, a series of rockable shaftsjournaled therein; a bank of keys pivoted in the frame; a correspondingseries of fingers provided with bolts normally retracted but projectedby thedepression of the related key; connections between said rockshafts arranged to operatethem in unison; said connections including finger-actuating mechanism comprising horizontal arms and aspring-controlled crossbar pivoted at the extremitiesof said arms; saidcross-bar adapted to engage, when depressed, with the projected bolts ofsaid fingers, and to tilton its pivots whenduring bolt; a magnetelement; a two-armed lever -located under the extremity of saidtwoarrned lever, and means holding the. latterin position; a' yieldingconnection between one arm of said twoar1ned lever and said rigid on oneof said shafts,adji1stable stops magnet element; stops arranged to limitthe return movement of said fingers rela-- tively to the normal orinitial position of the cross-bars of the arms of said fingeractuatingmechanism; a series of pivoted universal bails, one under each row ofkeys; means holding said universal bails in normal position; amake-and-break in circuit with the magnet element including fixed andmovable contacts normally apart; and means between said universal bailsand said movable contact whereby the depression of any- -one of theformer will move the latter to closed position; and one pole of thecircuit connectionof the magnet element including a switch normallyclosed, means carried by the'movable part of said 'magnet elementadapted to .open said switch the instant the magnet element has beenenergized and has acted.

12. In a device of the character described, the combination of a frame,a series of rockable shafts journaled therein; a bank of keys pivoted inthe frame; a corresponding series of fingers provided with boltsnormally retracted but'projected by the depression of the related key;connections between said rock shafts arranged to operate them in unison;said connections including finger-actuating mechanism comprisinghorizontal arms and a spring-controlled crossbarpivoted at theextremities of saidarms; said crossbar adapted to engage, whendepressed, with the projected bolts'o: said fingers, and to tilt on itspivots when during its return movement, it strikes a projected bolt; amagnet element; a two-armed lever rigid on one of said shafts,adjustable stops.

located under'the extremity of said twoarmed lever, and a spring holdingthe latter in position; a yielding connection between one arm of saidtwo-armed lever and said magnet element; stops arranged to limit thereturn movement of said fingers relatively to the-normal or initialposition of the cross- 'bars of the arms of said finger-actuatingmechanism; a series of pivoted universal bails, one under each row ofkeys; means holding said universal bails in normal position; amake-and-break in circuit with the magnet element including fixed andmovable contacts normally apart ;-and means between said universal bailsand said movable contact whereby the depression of any one of theformerwill move the latter to closed position; one pole of the circuitconnection of the magnet element including a switch normally closed,means carried by the movable part of said magnet element adapted to opensaid switch the instant the magnet eleoperated.

13. In a device of the character described, in combination with a bankof keys including a shift key, the fingers related to said keys, and-themechanism actuating such fingers; a pendent member on the fingeroperfated by the shift key, a spring-controlled shouldered stem slidingin said pendent member; and a device of the lever type supplementary toand operated by the shift key, -whereby the finger of the shiftkey, whenoperated, may beheld depressed after the shift key has been released.

14. In a device of thechar acter described,

in combination'with a-bank of keys including a shift key, the fingersrelated to said .keys, and the mechanism actuating such fingers; apendent member" on the finger 15. In a device of the characterdescribed,

'in combination with a bank of keys including a shift-key, the'finger'srelated to said keys, and the mechanism actuating such fingers; meanssupplementary to the shift key whereby the finger of the shift key, whenoperated, may be held depressed after the shift key has been released;and means to temporarily lock the supplementary shift key in depressedposition.

.16. K In a device of the character described, in combination with abank of keys including a shift-key, the fingers related to said keys,and the mechanism actuating such fingers; a pendent member on the fingeroperated by the shift-key, a spring-com trolled shouldered stem slidingin said pendent member; a device' of the" lever type supplementary 'toand operated by the shift key, whereby the finger of the shift key, whenoperated, may be held depressed after the shift key has been released;and means to temporarily lock the supplementary shift key in depressedposition.

17. The combination of the power element and connections, fingersprovided with projectable bolts, a finger-actuating mechanismcomprisingpivoted arms operated by said power element, a connectingcross-bar pivoted at the extremitieso'f the arms and adapted to engagewithithe projected-bolts of said fingers; and means-holding saidcross-bar in and returning it to its normal position, but permittingsaid crossbar to tilt on its pivots when, during itsreturn movement, itstrikes a projected bolt 4 18. The combination of. the .power j-elementand connections, fingers prpvidedwith projectable bolts, afinger-actuating mechanism comprisingpivoted' arms operated by I saidpower element, a cross-bar :connecting ,ranged to limit the returnmovement of the the extremities of said arms and adapted fingersrelatively to the normal or' initial 13 toengage With the projectedbolts of said position of said cross-bar. fingers; means holding saidcross-bar in GUSTAVIUS A. WIKANDER 5 and returning it to its normalposltlon, but permitting' said cross-bar to tilt on its pivlVitnesses:

ots when, during its return movement, it C. B. LONG, strikes api'ojectedbolt; and a stop an i O. O. MARTIN.

